Riding a bicycle at night is a bit dangerous, but electronics blogger Jenna DeBoisblanc shows off how to build a system that includes turn signals, a strobe light, speedometer, and brake lights to keep you safe.

The entire system is built on the backbone of an Arduino Uno with a few other parts totaling at about $150. That seems expensive, but DeBoisblanc's build covers a lot of ground. You not only get safety-centric features like turn signals and brake lights, you also get a handy speedometer and odometer so you always know how far you travelled. You can find the full guide, including videos, schematics, and code, over on DeBoisblanc's blog.